July weather forecast
Sioux City, IA

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Panorama of the vast Sioux City, Iowa
Panorama of the vast Sioux City, Iowa

Weather in July

July's distinctive weather pattern sets it up as Sioux City's warmest month, with high temperatures averaging at 83.8°F (28.8°C) and low temperatures at 64.9°F (18.3°C). July is when summer hits its peak in Sioux City, supported by the increase in daily sunshine and longer days. However, July is not the most comfortable month, as increased temperatures come with an above-average relative humidity of 76%. Community pools and leisure centers become hubs of activity during this time, providing respite from the heat. Despite the oppressive heat, these sunny days light up Sioux City, revealing the city's full summer splendor.

Temperature

July brings the highest temperatures in Sioux City, with an average high of 83.8°F (28.8°C) and an average low of 64.9°F (18.3°C).

Heat index

July's heat index is estimated at a tropical 91.4°F (33°C). Undertake enhanced precautions, heat exhaustion and heat cramps are possible risks. Continuous activity could trigger heatstroke.
Note that heat index values are valued for light wind and location in the shade. The heat index has the possibility to be enhanced by 15 Fahrenheit (8 Celsius) degrees when there is direct sun exposure.
Note: The heat index, also known as 'feels like' or 'felt air temperature', is a single figure representing how weather conditions feel when combining temperature and humidity. Additional factors encompassing metabolic differences, the level of physical activity, and clothing can impact the individual's perception of temperature. Awareness of direct sun exposure is crucial as it has the potential to heighten the weather's effects, pushing up the heat index by 15 Fahrenheit (8 Celsius) degrees. Heat index values are especially vital to children. Children regularly disregard the necessity to rest and replenish fluids. Thirst is a late symptom of dehydration - thus, maintaining hydration, particularly during long-lasting physical activities, is essential.

Humidity

The average relative humidity in July in Sioux City is 76%.

Rainfall

In Sioux City, in July, during 10.5 rainfall days, 1.34" (34mm) of precipitation is typically accumulated. In Sioux City, during the entire year, the rain falls for 102.3 days and collects up to 12.91" (328mm) of precipitation.

Snowfall

In Sioux City, snow does not fall in May through September.

Daylight

The average length of the day in July in Sioux City, Iowa, is 14h and 56min.
On the first day of July, sunrise is at 5:52 am and sunset at 9:06 pm. On the last day of the month, sunrise is at 6:17 am and sunset at 8:46 pm CDT.

Sunshine

The month with the most sunshine is July, with an average of 10.7h of sunshine.

UV index

June and July, with an average maximum UV index of 6, are months with the highest UV index in Sioux City. A UV Index estimate of 6 to 7 represents a high health vulnerability from unsafe exposure to UV radiation for the ordinary person.
Note: In July, a daily UV index of 6 turns into the following recommendations:
Prevent overexposure. Protection from the sun's harmful effects is needed. Attempt to stay under shade and limit exposure to the Sun between 10 a.m. and 4 p.m., when UV radiation is at its peak. Remember, devices such as parasols or canopies might not provide complete sun protection. Shield yourself from the harmful effects of UV radiation with sun-protective attire, a hat, and quality sunglasses.
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Frequently asked questions

What is the hottest time of year in Sioux City?

Sioux City's warmest temperatures are experienced in July, with average high temperatures of 83.8°F (28.8°C) and lows of 64.9°F (18.3°C).

How hot does it get in Sioux City in July?

The high-temperature, in July, in Sioux City, is 83.8°F (28.8°C), while the low-temperature averages to 64.9°F (18.3°C). The average heat index (a.k.a. 'apparent temperature', 'feels like'), which calculates the temperature value influenced by the moisture in the air, in July is estimated at 91.4°F (33°C).

What is the average humidity in July in Sioux City?

The average relative humidity in July is 76%.

How much does it rain in Sioux City in July?

In July, in Sioux City, the rain falls for 10.5 days. Throughout July, 1.34" (34mm) of precipitation is accumulated.

When it does not snow in Sioux City?

In Sioux City, Iowa, snow does not fall in May through September.

What is the average length of the day in July in Sioux City?

The average day length in July in Sioux City is 14h and 56min.

When are sunrise and sunset in July in Sioux City?

On the first day of July in Sioux City, Iowa, sunrise is at 5:52 am and sunset at 9:06 pm. On the last day of the month, sunrise is at 6:17 am and sunset at 8:46 pm CDT.

What month has the most sunshine in Sioux City?

July has the most sunshine of the year in Sioux City, with an average of 10.7h of sunshine.

How many hours of sunshine does Sioux City have in July?

In July, the average sunshine duration is 10.7h.

What are the months with the highest UV index in Sioux City?

June and July, with an average maximum UV index of 6, are months with the highest UV index in Sioux City.

What is the UV index intensity in July in Sioux City?

In July, the average daily maximum UV index in Sioux City is 6. A UV Index of 6 to 7 symbolizes a high health threat from exposure to Sun's UV rays.
Average humidity
Average rainfall days
Average snowfall
Average snowfall days
Average daylight
Average sunshine
Average sunshine days
Average UV index
Average cloud cover
Average visibility

Average temperature in July
Sioux City, IA

Average temperature in July - Sioux City, IA
  • Average high temperature in July: 83.8°F

The warmest month (with the highest average high temperature) is July (83.8°F).
The month with the lowest average high temperature is January (27°F).

  • Average low temperature in July: 64.9°F

The month with the highest average low temperature is July (64.9°F).
The coldest month (with the lowest average low temperature) is January (13.5°F).

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Average pressure in July
Sioux City, IA

Average pressure in July - Sioux City, IA
  • Average pressure in July: 29.94"Hg

The month with the highest atmospheric pressure is January (30.16"Hg).
The month with the lowest atmospheric pressure is June (29.86"Hg).

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Average wind speed in July
Sioux City, IA

Average wind speed in July - Sioux City, IA
  • Average wind speed in July: 7.5mph

The windiest month (with the highest average wind speed) is April (11mph).
The calmest month (with the lowest average wind speed) is July (7.5mph).

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Average humidity in July
Sioux City, IA

Average humidity in July - Sioux City, IA
  • Average humidity in July: 76%

The month with the highest relative humidity is January (83%).
The month with the lowest relative humidity is October (65%).

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Average rainfall in July
Sioux City, IA

Average rainfall in July - Sioux City, IA
  • Average rainfall in July: 1.34"

The wettest month (with the highest rainfall) is June (1.85").
The driest months (with the least rainfall) are January and February (0.39").

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Average rainfall days in July
Sioux City, IA

Average rainfall days in July - Sioux City, IA
  • Average rainfall days in July: 10.5 days

The month with the highest number of rainy days is June (14.6 days).
The month with the least rainy days is January (2.6 days).

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Average snowfall in July
Sioux City, IA

Average snowfall in July - Sioux City, IA
  • Average snowfall in July: 0"

The month with the highest snowfall is January (1.77").
The months with the least snowfall are May, June, July, August and September (0").

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Average snowfall days in July
Sioux City, IA

Average snowfall days in July - Sioux City, IA
  • Average snowfall days in July: 0 days

The month with the highest number of snowfall days is January (8.2 days).
The months with the least snowfall days are May, June, July, August and September (0 days).

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Average daylight in July /
Average sunshine in July
Sioux City, IA

Average daylight in July / Average sunshine in July - Sioux City, IA
  • Average daylight in July: 14h and 5min

The month with the longest days is June (Average daylight: 15h and 12min).
The month with the shortest days is December (Average daylight: 9h and 6min).

  • Average sunshine in July: 10h and 4min

The month with the most sunshine is July (Average sunshine: 10h and 42min).
The month with the least sunshine is January (Average sunshine: 4h and 30min).

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Average sunshine days in July
Sioux City, IA

Average sunshine days in July - Sioux City, IA
  • Average sunshine days in July: 17.1 days

The month with the most sunshine days is January (22.6 days).
The month with the least sunshine days is June (13.1 days).

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Average UV index in July
Sioux City, IA

Average UV index in July - Sioux City, IA
  • Average UV index in July: 6

The months with the highest UV index are June and July (UV index 6).
The month with the lowest UV index is January (UV index 1).

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Average cloud cover in July
Sioux City, IA

Average cloud cover in July - Sioux City, IA
  • Average cloud cover in July: 25

The month with the most cloud cover is January (Cloud cover 51).
The month with the least cloud cover is July (Cloud cover 25).

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Average visibility in July
Sioux City, IA

Average visibility in July - Sioux City, IA
  • Average visibility in July: 6mi

The months with the highest visibility are January, February, March, April, May, June, July, August, September, October, November and December (6mi).
The months with the lowest visibility are January, February, March, April, May, June, July, August, September, October, November and December (6mi).

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Sioux City, Iowa, USA

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